Which activities resulted from the two oil crises in the 1970s? Select four options. exploration for new sources of energy
O creation of the Department of Energy
O production of energy-efficient automobiles
reduction of prices people paid for gasoline
O establishment of an automobile speed limit nationally

How did european exploration and expansion cause the african slave trade to expand? a. european explorers discovered the slave trade and expanded it across the indian ocean into south asia. b. arab armies captured european explorers and forced them into slavery. c. european traders shipped enslaved africans to work on plantations in european colonies in the americas. d.european explorers captured african people and forced them to work on their ships.